I have a Fedora Core 2 install on Gateway VTX400 laptop and the laptop supports 1024x768 resolution. However my screen only shows 800x600. Although I can set X11 to use 1024x768 (by modifying /etc/X11/xorg.conf and by using Start->System Settings->Display) however the resolution remains the same, i.e. at 800x600. I notice that GNOME does not allow me to set the resolution higher than 800x600 (by using Start->Preferences->Resolution), how do I fix this?